Hotmail users can use the "[email protected]" email filtering trick — so, you know, it's at Gmail's level from five years ago. But it's got an even more powerful spam-fighting, privacy-protecting option: creating an entirely new address that arrives right in your inbox.
Each Hotmail user gets five aliases per year, and a total of 15 aliases. The tricky part is finding email addresses that haven't been taken on the world's most popular email service, but if you can think up a long or unique enough thread, your Hotmail alias is really convenient. You hand it out, the email arrives into a labelled folder in your inbox, and you reply or forward those messages from that same address — or you can switch back to your regular email address when everything appears on the up-and-up.
Convenient offering — what can you imagine using it for?